And this just might be a dumb American point of view but wouldn't the Netherlands wanna tell the E.U. to fuck off just for pride in being a sovereign nation. Americans would be outraged that someone was telling us what do, even it was something as minor as only effecting tourists, especially if it hit someones bottom line haha.
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The USA has Federal and State laws.
Regarding Pot the federal law is telling every state what's up and the state can take it and/or make it worse, just not better/easier than what the federal law requires hence is is state legal to grow pot on a certain level in Cali but it still is federally illegal to do so.
Florida for example has worse pot penalties than what the federal law requires.
So your argument "Americans would be outraged that someone was telling us what do" it pretty much meaningless.
The EU can and does tell its EU members how to handle certain things just like the federal law is controlling federal laws in the United States. Each of the 50 states are very limited about modifying it.